204115771 has 2 divisors, whose sum is σ = 204115772. Its totient is φ = 204115770.

The previous prime is 204115759. The next prime is 204115789. The reversal of 204115771 is 177511402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204115771 - 2⁵ = 204115739 is a prime.

It is equal to p_11294209 and since 204115771 and 11294209 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (204110771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102057885 + 102057886.

It is an arithmetic number, because the mean of its divisors is an integer number (102057886).

Almost surely, 2^204115771 is an apocalyptic number.

204115771 is a deficient number, since it is larger than the sum of its proper divisors (1).

204115771 is an equidigital number, since it uses as much as digits as its factorization.

204115771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 204115771 is about 14286.9090778937. The cubic root of 204115771 is about 588.7878695685.

The spelling of 204115771 in words is "two hundred four million, one hundred fifteen thousand, seven hundred seventy-one".